Experiment Design, Forces And Work: Question Preview (ID: 21674)


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When designing an experiment, how many independent variables should you have?
a) one b) two c) three d) four or more
The one factor that is changed in an experiment is the
a) control b) dependent variable c) independent variable d) observation
What unit is WORK measured in?
a) Joules b) Newtons c) Celsius d) Calories
If you pull a wagon with 25 N of force over a distance of 5 m, how much work have you done?
a) 29 J b) 125 J c) 5 J d) no work was done
What is formula for work?
a) Work = mass x distance b) Work = Force / distance c) Work = Force x acceleration d) Work = Force x distance
The WORK done when using a ramp
a) can't be determined b) is more than when you lift the object straight up. c) is less than when you lift the object straight up. d) is the same as when you lift the object straight up.
When you use a ramp, it takes less force but you have to
a) push harder b) accelerate the object more c) move the object a greater distance d) make sure the ramp is twice as long as the mass of the object
You pull on a locked door as hard as you can. Why wasn't there any work done?
a) the door was broken b) the door did not move c) because you pulled on the door d) WORK was done on the door
Why do people use ramps to move heavy objects?
a) Because they are lazy b) Because it takes more force to move an object up a ramp than lifting it c) Because it takes less force to move an object up a ramp than lifting it d) Because it would decrease the distance you had to move the object
At the end of science class, you pick up your binder and carry your things to your next class. When did WORK occur?
a) there was no work done b) when you picked up the binder c) when you picked up the binder and carried it to your next class d) when you carried it to your next class
You are dribbling a basketball down the court and pass the ball to your teammate. When did WORK occur on the ball?
a) only when you dribbled the ball b) when you dribbled the ball and when your teammate caught it c) when you held the ball d) when you dribbled the ball and when you threw it down court to your teammate
Work occurs when
a) an object moves b) a force is applied to an object and the object moves c) a force is applied to an object and the object moves in the direction of the force d) a force is applied to an object and the object moves in the opposite direction of the force
Emmy pushes on a box with 10 N of force to the left, while Claire pushes on the box with 8 N of force to the right. What will happen to the box?
a) It will not move. b) It will move to the left. c) It will move to the right. d) Not enough information to determine if the box will move or not.
If the net force on an object is 0 N, then
a) there are several forces acting on it. b) the forces acting on it are balanced. c) the forces acting on it are unbalanced. d) it will move.
If the net force on an object is 60 N, then
a) there is only force acting on it. b) the forces acting on it are balanced. c) the forces acting on it are unbalanced. d) it will not move.
If forces are in opposite directions,
a) you add them to get the net force. b) you subtract them to get the net force. c) they are always equal. d) they will have the same acceleration.
A force ...
a) always causes on object to move. b) can be measured in kilograms. c) is a push or a pull. d) is the amount of work done.
If forces are in the same direction,
a) you add them to get the net force. b) you subtract them to get the net force. c) they are always equal. d) they will have the same acceleration.
What you measure or observe to obtain your results. (In the video, it would have been when they measured the height of the plants after Spring Break.)
a) independent variable b) dependent variable c) control d) conclusion
Factors in an experiment that stay the same. (In the video, it would have been the amount of sunlight, type of soil, type of pot, type of plant, temperature of room, etc.)
a) hypothesis b) control c) factor d) data
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